feat: add knowledge module caching layer (closes #79)

apps/api/src/knowledge/knowledge.module.ts

@@ -2,7 +2,7 @@ import { Module } from "@nestjs/common";
 import { PrismaModule } from "../prisma/prisma.module";
 import { AuthModule } from "../auth/auth.module";
 import { KnowledgeService } from "./knowledge.service";
-import { KnowledgeController } from "./knowledge.controller";
+import { KnowledgeController, KnowledgeCacheController } from "./knowledge.controller";
 import { SearchController } from "./search.controller";
 import { KnowledgeStatsController } from "./stats.controller";
 import {
@@ -11,11 +11,17 @@ import {
   LinkSyncService,
   GraphService,
   StatsService,
+  KnowledgeCacheService,
 } from "./services";
 
 @Module({
   imports: [PrismaModule, AuthModule],
-  controllers: [KnowledgeController, SearchController, KnowledgeStatsController],
+  controllers: [
+    KnowledgeController,
+    KnowledgeCacheController,
+    SearchController,
+    KnowledgeStatsController,
+  ],
   providers: [
     KnowledgeService,
     LinkResolutionService,
@@ -23,6 +29,7 @@ import {
     LinkSyncService,
     GraphService,
     StatsService,
+    KnowledgeCacheService,
   ],
   exports: [KnowledgeService, LinkResolutionService, SearchService],
 })